lkml.org 
[lkml]   [2007]   [Apr]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: 2.6.21-rc6-mm1 ima "BUG: held lock freed!"
    From
    Date
    On Tue, 2007-04-10 at 15:00 -0400, Reiner Sailer wrote:
    > Joseph,
    >
    > we cannot reproduce the BUG you report. We have identified a potential
    > source (spinlock around mutex_init). I have attached a small patch that
    > removes this lock from the initialization of the hash table. I have
    > tested the patch but I cannot verify if this resolves the problem you
    > are seeing.
    >
    > If you can reproduce the problem, would you mind to apply this patch and
    > let us know if this solves the problem?

    The BUG message no longer appears with this patch applied. It was 100%
    reproducible before, so I think this fixed it.

    Thanks!

    --
    Joseph Fannin
    jfannin@gmail.com || jhf@columbus.rr.com

    > > I'm seeing this while booting:
    > >
    > > ima (ima_init): No TPM chip found(rc = -19), activating TPM-bypass!
    > >
    > > =========================
    > > [ BUG: held lock freed! ]
    > > -------------------------
    > > swapper/1 is freeing memory c04c7660-c04c76a3, with a lock still held
    > > there!
    > > (ima_queue_lock){--..}, at: [<c0202710>] ima_create_htable+0x10/0x90
    > > 1 lock held by swapper/1:
    > > #0: (ima_queue_lock){--..}, at: [<c0202710>] ima_create_htable+0x10/0x90
    > >
    > > stack backtrace:
    > > [<c0105959>] dump_trace+0x1d9/0x210
    > > [<c01059aa>] show_trace_log_lvl+0x1a/0x30
    > > [<c0106612>] show_trace+0x12/0x20
    > > [<c01066d6>] dump_stack+0x16/0x20
    > > [<c014fd3a>] debug_check_no_locks_freed+0x17a/0x180
    > > [<c014cdbf>] debug_mutex_init+0x1f/0x50
    > > [<c0145451>] __mutex_init+0x41/0x50
    > > [<c020277d>] ima_create_htable+0x7d/0x90
    > > [<c020286f>] ima_init+0x3f/0x270
    > > [<c051b765>] init_evm+0x1f5/0x250
    > > [<c05015d2>] kernel_init+0x132/0x320
    > > [<c010532f>] kernel_thread_helper+0x7/0x18
    > > =======================
    > >
    > > I saw this in -rc5-mm4 also.
    > >
    > > I couldn't find a contact address in MAINTAINERS, so I've CC'd the
    > > two authors listed on top of ima_create_htable.c , as well as the
    > > first submitter of the IMA stuff I found in my LKML archive.
    > >
    > > As an aside, this computer does have (some sort of) TPM chip, but
    > > the driver is built as a module, and not loaded at this point (not a
    > > worry for me, I don't intend to use it).
    > >
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-04-11 15:59    [W:2.374 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site